Facts About Poison Oak, Ivy and Sumac Poison Oak, Ivy and Poison Sumac emit the poisonous, oily irritant urushiol on the plant's stem, roots, branches, and leaves. The urushiols chemically "lock on" to skin proteins within 20 minutes after exposure to the plants (including dormant plants or long-dead prunings), contaminated clothes or tools, or even contaminated pets.
Poison ivy This site shows you what a variety of poison ivy types look like in different seasons.
Poison Ivy, Oak and Sumac The leaves of Poison Ivy, Poison Oak and Poison Sumac all contain urushiol, an irritating oil that causes severe itching and blistering on contact. Poison Sumac causes an immediate reaction, but it may be many hours before a victim notices the effects of Poison Ivy and Oak.
Poison Ivy, Oak and Sumac Information Center This web site is dedicated to those individuals that have ever experienced and suffered through the itching and painful rashes associated with contact of an oil called urushiol (you-ROO-shee-ol) from these plants.
Poison Ivy, Oak, and Sumac injury Dermatitis is caused by a sensitivity to the oil of these plants. The rash is spread by the oils touching various parts of the body. It is not spread by the fluid of the blisters , thus it is not contagious unless the oil remains on the skin and is touched by another person.
Poison Oak - A Plant To Avoid This uncherished native plant of California, the botanical name of which is Toxicodendron diversilobum (an older botanical designation being Rhus diversiloba), is a close relative of poison ivy, which is widespread in the eastern and central United States.
